[asterisk-users] Simplex voice on TDM410P

[jonas kellens]

I have posted a similar problem earlier on this mailing list with my
Asterisk-system + TDM410 + Grandstream telephones.
But there has not yet been a response to this.

My client is also experiencing a 'simplex' conversation. There seems
that audio can only flow 1 one way at the same time.

What I have tried is change the codec on the internal SIP-network from
alaw to gsm (so more compression, less bandwidth needed) but problem not
yet resolved.

Also I don't know where to begin to look for the problem...
So, I'm curious for the solution.

Greetingz,
Jonas.

On Sat, 2009-05-30 at 14:35 -0400, Nathanial A. Byrnes wrote:

> Hello,
>    I am working on a trixbox based system with a TDM410P connected to 3 
> phone lines from the CO. The asterisk box is on a full duplex 100Mb LAN 
> with some polycom and Aastra SIP phones. In general everything works. 
> the problem I am trying to solve is that if both parties to a call speak 
> at the same time one of the voices gets cut out such that the talker A 
> cannot hear what talker B is saying. When talker A stops talking, he/she 
> can then hear what talker B says. This issue occurs across all the 
> different phones we have set up. I have played with the OSLEC settings 
> in the thoughts that the echo cancellation was being a bit ambitious, to 
> no avail. Any recommendations on how to best troubleshoot / correct this 
> issue?
> 
>     Thanks and Regards,
>     Nate
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